Effect of organic inputs on strength and stability of soil aggregates associated organic carbon concentration under rice-wheat rotation in indo-gangetic plain zone of India

The study aims to elucidate the impact of organic inputs on strength and structural stability of aggregates in a sandy loam soil of Indo-Gangetic Plain Zone of India. Tensile strength, friability and water stability of aggregates, and the carbon contents in bulk soil and in large macro (>2 mm), small macro (0.25-2 mm), micro (0.053-0.25 mm) and silt+ clay size (
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Effect of organic inputs on strength and stability of soil aggregates associated organic carbon concentration under rice-wheat rotation in indo-gangetic plain zone of India Int.J.Curr.Microbiol.App.Sci (2017) 6(10): 1973-2008 International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 10 (2017) pp. 1973-2008 Journal homepage: http://www.ijcmas.comReview Article https://doi.org/10.20546/ijcmas.2017.610.237 Effect of Organic Inputs on Strength and Stability of Soil Aggregates Associated Organic Carbon Concentration under Rice-Wheat Rotation in Indo-Gangetic Plain Zone of India R.K. Naresh1*, A.S. Panwar2, S.S. Dhaliwal3, R.K. Gupta4, Arvind Kumar5, R.S. Rathore6, Ashok Kumar7, Dipender Kumar8, Mohan Lal1, Sunil Kumar2, Saurabh Tyagi1, Vineet Kumar2, S.P. Singh7, Vikrant Singh9 and Nihal Chandra Mahajan1 1 Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut-250110, U.P., India 2 Indian Institute of Farming System Research, Modipuram-250110, U.P., India 3 Department of Soil Science, Panjab Agricultural University, Ludhiana, Punjab, India 4 Borlaug Institute for South Asia (BISA), New Delhi -110 012, India 5 Rani Lakshmi Bai Central Agricultural University, Jhansi- U.P., India 6 Uttar Pradesh Council of Agricultural Research, (UPDASP), Lucknow- U.P., India7 Department of Soil Science, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut-250110, U.P., India 8 Department of Agronomy, Panjab Agricultural University, Ludhiana, Punjab, India 9 Directorate of Sugarcane Development, Aliganj, Lucknow- 226024 (U.P.), India *Corresponding author ABSTRACT The study aims to elucidate the impact of organic inputs on strength and structural stability of aggregates in a sandy loam soil of Indo-Gangetic Plain Zone of India. Tensile strength, friability and water stability of aggregates, and the carbon contents in bulk soil and in large macro (>2mm), small macro (0.25-2 mm), micro (0.053-0.25 mm) and silt+ clay size (0.25 mm) constituted 58–92% of water stable aggregates and varied significantly among treatments and soil depths. Organic materialArticle Info incorporation improved soil aggregation and structural stability and resulted in higher C content in macro-aggregates. Higher macro-aggregates in the crop residue- and farmyard manure-treatedAccepted: soils resulted in a higher aggregate mean weight diameter, which also had higher soil organic C17 September 2017 contents. The bulk soil organic C had a strong relation with the mean weight diameter ofAvailable Online: aggregates, but the soil organic c content in all aggregate fractions was not necessarily effective10 October 2017 for aggregate stability. The soil organic C content in large macro-aggregates (2-8mm) had a significant positive effect on aggregate stability, although a reverse effect was observed for aggregates Int.J.Curr.Microbiol.App.Sci (2017) 6(10): 1973-2008Introduction sensitive to soil management (Blanco-Canqui et al., 2005). High TS of aggregates helps inCrop residues, usually considered a problem, proper maintenance of soil tilth and pro-videswhen managed correctly can improve soil a stable traction for farm implements, butorganic matter dynamics and nutrient cycling, limits intra-aggregate root growth (Król et al.,thereby creating a rather favorable 2013; Turski, 2002). The friability of the soil,environment for plant growth. The intelligent on the other hand, is the tendency of a body ofmanagement and utilization of crop residues soil to break into smaller pieces under anis essential for the improvement of soil applied stress or load (Watts and Dexter,quality and crop productivity under rice-based 1998). This might be another importantcropping systems of the tropics. Viable option physical property of agricultural soils, sinceis to retain residue in th ...